In my database, I have 2 companies and three-level users.

admin level, manager level, salesperson. (Company A and Company B)

The salesperson can see all customer by the record rule : ['|',('user_id','=',user.id),('user_id','=',False)]

Manager level wants to see all customers in that particular branch by the record rule : [('company_id','in',[user.company_id.id])]

Admin level user by the reord rule : [(1,'=',1)]

But my question is that I need to hide some personal customers of admin-level from manager level user? In the above record rule, manager-level users can see all the customers in that particular company including personal customers of the admin also. 

How can I hide the personal customer of admin users?

How is it possible?